Japanese police have arrested the CEO of the failed company MtGox, which was once the world’s biggest exchange of the virtual currency, bitcoin.
Mark Karpeles, 30, is being held in connection with the loss of bitcoins worth $387m (£247m, €351m) last February.
He is suspected of having accessed the exchange’s computer system to falsify data on its outstanding balance.
MtGox claimed it was caused by a bug but it later filed for bankruptcy.
Japan’s Kyodo News said a lawyer acting on Mr Karpeles’ behalf denied his client had done anything illegal.